paull@hplabs.UUCP (Rob KA6SFV) (01/29/85)
With all this talk about 14-bit, 16-bit, 2x, 4x, 9999x word widths and sampling rates, does any one know what technique is used to RECORD a CD ?????? It seems to me that the playback can't be any better that the recording. So anyone know??? Rob Paull
herbie@watdcsu.UUCP (Herb Chong [DCS]) (01/30/85)
In article <1511@hplabs.UUCP> paull@hplabs.UUCP (Rob KA6SFV) writes: > > With all this talk about 14-bit, 16-bit, 2x, 4x, 9999x >word widths and sampling rates, does any one know what technique is >used to RECORD a CD ?????? > It seems to me that the playback can't be any better that the >recording. So anyone know??? > Rob Paull The recording is done using whatever digital recorder happens to be handy that is close to some standard. As it happens, the actual recorder probably isn't too important compared to the number of bits used, sampling rate, and the filtering techniques used (assuming decent analog inputs are fed to it from the microphone amplifiers). CD's are pressed much as records are, but the information is nothing but a lot of little pits in the surface. Minor defects in the surface are corrected by the CRC digital correction logic in the CD player. As for actual recording techniques, by and large, they are done the smae way recordings have been done for the last thirty or so years. The one chosen is more or less up to the recording engineer. All this discussion about bits, etc., is because the limits of digital recording and playback systems are determined by the number of bits and the sampling rate. There is some question whether the current standards are adequate. Herb Chong... I'm user-friendly -- I don't byte, I nybble.... UUCP: {decvax|utzoo|ihnp4|allegra|clyde}!watmath!water!watdcsu!herbie CSNET: herbie%watdcsu@waterloo.csnet ARPA: herbie%watdcsu%waterloo.csnet@csnet-relay.arpa NETNORTH, BITNET, EARN: herbie@watdcs, herbie@watdcsu
stadlin@hou2h.UUCP (Art Stadlin) (01/31/85)
> With all this talk about 14-bit, 16-bit, 2x, 4x, 9999x > word widths and sampling rates, does any one know what technique is > used to RECORD a CD ?????? > Rob Paull The January issue of "Digital Audio" magazine describes how the program data are encoded onto the disc. -- \\\ \\\\ Art Stadlin \\\\\\________!{akgua,ihnp4,houxm}!hou2h!stadlin